Concrete-reenforcing-rod chair



March 8, 1927 1,620,501

R. .VOGEL CONCRETE REENFORCING ROD CHAIR Filed Spt. 15 1926 (16301 we14E? li ateiited Mar. ti, llQZi.

BEINHQLD VOGEL, 013 SOUTH WILTQN, CONNECTICUT.

CONCRETE-BEEN ?ORCING-I'LUD CHAIR.

Application filed September 15, 1926. Serial No. 135,525.

side wall and surfaces of the concrete and At the presalso with respectto each other.

cut time a common way to support them during the pouring" operation isby means of wooden chairs or frames or chairs made of heavy wire towhich they are wired by wrapping a smaller wire about the support andthe rods. These constructions are not satisfactory because it requiresconsiderable labor to wire the reenforcing rods to the sup orts, thatthey will not shiftoutof position during;

the pouring and tamping of the concrete. It is, therefore, an object ofmy invention to provide a chair or support for the. reenforcing rodswhich will securely hold them in the roper position without thenecessity of wirfill ing the rods to the supports, or if such wiring isfound desirable it will be greatly simplltied, and also to provide asupport which may be manufactured at low cost, will accu rately positionthe reenforcing rods, and will 3 prevent their shifting out of positionduring the laying of the concrete.

With the foregoing and other objects in view, I have devised aconstruction of chair for supporting these reenforcing rods, thepreferred form of which is illustrated inthe accompanying drawing. Inthis drawing,

Fig. l is a transverse section through the outer side edges of a sectionof concrete road showing the longitudinally extending reen forcing rodsor bars and the method of supporting the sameby means of my improvedsupport or chair.

Fig. 2 is a top plan View showing the reenforcing rods and the chairs inposition,

the distance between the chairs, however, not

being to scale.

Fig. 3 is a side elevation. of the chair on a larger scale showing thereenforcing rods in position, and V Fig. i an end elevation thereoflooking from the ri ht of his. 3.

and also it is difficult to so wire them The concrete is represented. bythe numeral 5, and as is well known it is laid between suitable formswhile wetand held thereby until it has sufficiently hardened or set. Theside members of this form are indicated at (i. The outer side portionsof the I concrete road are reenforced by longitudinally extending steelrods or bars and these rods mustbe accurately located according tospecifications. In the drawing these rods or bars are indicated at 7 8and 9, the common construction calling for three of these rods, thelower rod 7 and upper rod 8 bein located about four inches inwardly fromthe edge of the concrete and they are vertically spaced about fourinches from each other, looming about two inches between the upper rodand the surface of the, concrete and the same dis tance between thelower rod and thebottom I of the concrete. The other upper rod 9 isspaced inwardly about six inches from the rod 8 and in substantiallythesame plane.

In laying the concrete these/rods must be very accurately located tosecure the desired results, and heretofore considerable difliculty hasbeen experienced in economically securing them in the right positionsand holding them there during the operation of laying the concrete.Common forms of support are wooden chairs or bent wires to which therods are secured by wrapping a wire around them, but these are notsatisfactory as the wires slip and the wiring requires considerablemanual labor as there are a lar e munber of these chairs used. Generallyt ey are placed about two and one-half feet apart. With my constructionof chair, however, the reenforcing rods are properly supported Withoutthe necessity of any wiring operation, and they are firmly held in theproper relative positions during the laying of the concrete. Thesechalrs are. made of a sin-.

gle piece of relatively heavy wire or small rod bent substantially tothe shape shown in the drawing. The rod is bent laterally in the samedirection at two points 10 and 11 spaced a proper distance from eachother to form a horizontally extending upper portion 12 and two uprights13 and 14 at the opposite ends thereof. The top member is also bent oroffset downwardly at 15 and 16 adjacent the bends 10 and 11 to formsubstan tially ll-shaped loops which provide seats for the rods 8 and 9,and, of course, these downwardly extending" seats or oifsets are solocated as to give the proper distance between:

the rods 8 and 9. The upright member 15 is inclined inwardly somewhatfrom the bend and is bent or wound to form an eye or loop 17 therequired distance below the offset 15, and the inward incline of theupper upright brings this loop in substantially the same plane as therod 8. It is preferred to make this loop as one continuous convolutionwhich will wrap entirely around the rod 7, as it is easier to make andwill also firmly hold this rod against lateral movement in anydirection. The side member extends downwardly from this loop and is thenbent outwardly, as shown at 18, to form a horizontal iortion 19,preferably extending in substantially the plane of the chair, and

at its outer end it is bent laterally to form a foot 20. The foot 20' islocated a distance outwardly "of the loop 17 so that when the chair isplaced with this foot against the inner wall of the side member 6 of theform the loop 17 and the offsets and 18 which clinedinwardly somewhatbut at its lower.

end is bent laterall at 21 in the opposite direction from the diet andthen. upon itself at 22 to form a portion extending in the oppositedirection and of sufficient length to extend beyond the plane of thechair on the same side as. the foot 20. These feet, therefore, providelateral supports for the chair on both sides of the plane of the chair.

in placina the reentorcement in osition the require number, of chairsare t readed onto the rod 7 by inserting this rod, through the eye iii,The chairs are then placed with the foot 26 against the inner wall oithe side the frame 6 at the proper distances apart. The upper rods 8 and9 are then merely placed in the ofl'sets To and 16, It will be obviousthat the chairs will securely hold all threeof these reenforcing rods inproper relation to each otherand also'the surfaces of the concrete. A.downward pressure on the top portion 12 will more firmly clamp the rod2. It will also apparent that the operation of locating the chairs andplacing reen'forcing rodstherein is very simple one which be quickly andeasily performed The rod '2 is gripped by the walls of the loop 1'? andfirmly held against lateral movement in any direction and. there is verylittle danger of either of therods 8 and 9 being shifted out of theirseats. Should, however, ll; be found desirable to positively hold themin these seats this maybe done by means of a piece of Wire or rod'Qll,which, as shown in Fig. 3, may be extended across and laid on the top ofthe rods 8 9 and. its opposite ends merely laterally and s)" needthrough the loops iormedby the bends it) and .il. It will be seen thatwill firmly hold the rods 8 and 9, in their loops and prevent upwardmovement or displacement of these rods. In order to prevent spreading ofthe supportin;; side members 13 and let under the weight of the rods andconcrete 1 may connect them at their lower portions by means of a tierod 25, which is a piece of wire or rod similar to or the same as thestockused for the chair'and atits opposite ends bent into an eye aroundthe members 13 and 14.

Having thus set forth the nature of my invention, What 1 claim is:

l. A chair for supporting rcenforcing rods comprising upright sidemembers one of which is provided with a loop to support a transverselyextendingrccnl'orcing rod, a top member comm-ting the side members andprovided with spaced downwardly eurvcdpol'tions to form seats forreenforciug rods, and laterally extending feet at the lower ends of theside members.

2. A chair for supporting reen'forcing rods comprising a rod bent toform a horizontal top member and upright side members, one of said sidemembers being bent into a loop to embrace a recni'orcing rod and the topmember being provided with spaced downwardly extendii'ig bends to formseats for reeniforcing rods, and the lower ends of the side membersbeing bent laterally to form feet.

A chair for supporting rcenforcing rods conmrising, a rod bent at spacedpoints to form a horizontal top portion and upright side portions, one0'! said side portions being provided with a loop to embrace atransversely extending reeni'orcing rod, the top member being benttilou'nwardly to form a seat for a reentorcing rod, and one of the sidemembers being bent laterally at its lower end to form a toot to hold thechair upright.

A chair for supporting reen'forciug rods comprising a rod or relativelyheavy wire bent to substantially inverted U-sbupc to provide ahorizontal upper nu-mber and upright side members, said upper nu-mb-t-rbeing provided with spaced downwardly oil'- set bends to provide seatsl'or transversely extending reenforcing rods and similar inverted bendsadjacent the first bends, and a wire or rod extending across over thetransverse rods and extending into and held by said inverted. bends,

5. A chair i'or supporting reenforcing rods comprising a rod orrelatively heavy wire bent to substantially inverted U-shape to providea horizontal upper member and up 'iglitside members, one of said sidemem hers being bent into a loop to embrace a transversely extendingreeniorcing rod and having a horizontally extending foot at its lowerend, said upper member being provided with spaced downwardly offsetbends to provide seats for transversely extending Hill ' directionat-spaced points to provide a hori reenforeing rods and similar invertedbends adjacent the first bends to hold a transverse wire or redextending across over the trans verse rods.

6. A chair for supporting reenforeing,

rods comprising a rod bent in the same .upright portions being bent intoa loop to embrace a reenforcing .rodand extending outwardly below theloop in the plane of the chair and then laterally to form a foot at itslower end, the other upright. portion being bent laterally at its lowerend and back- 'wardly upon itself in the oppositediretion to form afoot.

7. A chair for supporting reenforcing rods comprising a rod bent tosubstantially inverted U-shape with the upper part provided with seatsfor IGGIlfOlCll'lg rods and one of the side members provided with a seatfor. a similar. rod, laterally extending feet at the lower ends of theside members,

and a tie rod connecting the side members adjacent their lower ends.

In testinlony whereof I affix my signa tnre.

REINHOLD VOGEL.

